加速型钻井液离心机内部流场研究

随着钻井工艺与新技术的发展，以及各种系列振动筛研发的成功，对固控系统中离心机的工作能力以及处理范围提出了更高的要求；传统的离心机受工艺水平和结构特点的约束，处理量提高的前景并不乐观；分析了目前国内、外钻井液离心机处理量无法进一步提高的制约因素；讨论了某新型钻井液离心机的工作原理和特点，认为分散加料、二次加速、从卸料端进料、框架式的螺旋结构等都是提高离心机处理量的革新技术；并对该型离心机的内部流场进行了分析和讨论，基于N-S方程以及该型号离心机的结构特点，重新定义边界条件，求解了离心机内部流场的数学模型并得出了该型离心机处理量的计算方法；经过计算和现场试验数据的对比，证明了模型的可行性。

THE FLUID FIELD OF THE INTERNAL DRILLING FLUID CENTRIFUGE

As the new drilling technology and technique develop, and the various Shale Shakers come into use, the centrifuge in solids control system makes a higher claim for the operation capability and range; It's difficult to improve the traditional centrifuge because the limitation of technology and structural character itself; the authors of the paper analyze the restrained factor that the processing capacity of the drilling fluid centrifuge can't be raised currently both home and abroad, and presente the operation principle and characteristics of a certern new centrifuge, it is recognized the technical innovation of improving centrifuge processing capacity is scattering feeding, two times acceleration, feeding from the outlet and theframeshaped crew structure. In the meantime, the authors study the internal fluid field in the centrifuge, give out the mathematics model based on the NS equation, redefine a boundary condition according to the work characteristics and get the calculating method for processing capacity. It proves the flexibility of the model through the contrasting data between the calculation and the insitu test.